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Catia V5 Kinematics 1

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Atilano1

Atilano1

New member
Mar 21, 2023
5
Good evening. I was looking for someone that could tell me how can I simulate an engine valve opening but it is activated thought a follower instead of a cam. And the follower is not in constant contact with the valve as the cam.
I will leave an image of the engine design. If someone thinks that can help me or if wants to now more details of the issue, feel free to reply.
In this case I want to open the blue valve of the image using the pink follower that only has translational movement in one direction. The follower moves trought a cam follower that is connected to a cylindrical cam painted as brown. The all engine works perfectly and the only joint left for the movement to be completed is the valve opening.
Screenshot_6_htke5f.png
 
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is the blue valve always in contact with the pink follower?
 
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No. The blue valve and the pink follower are only in contact furing the lift section highlighted in the image below. In the rest of the profile taht you see in blue, teh follower is not in contact wiht the valve.
Screenshot_1_yg3fnt.png

Screenshot_8_h29wsc.png
 
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I believe this will require two Kinematic mechanisms: 1 mechanism when not in contact (no blue piston), and another mechanism when the blue piston is in contact. Then you will need to set up some timing to drive the first one, and then drive the second. You're really trying to do something that CATIA Kinematics wasn't written to do, at least with V5.

But maybe someone else knows more about this, or maybe you can do it with V6. I'd like to be proven wrong.
 
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adding to jackk's comment:
It is possible to create a SEQUENCE of two or more mechanisms in order to depict a realease of a joint at a certain point.
Thus the motion needs to be described as two separate mechanisms, yielding two separate simulations. These simulations could then be fused to form a SEQUENCE accurately showing the complete motion of the (full) mechanism.


regards,
LWolf
 
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I was assuming that could not be possible as the spring is also not possible.
Thank you both guys anyway. I aprreciate the effort.
 
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